Derrick.



PATENTED MAR. 24, 1903.

0. J. REISE. DERRICK.

' APPLICATION FILED JULY 25, 1902.

a sums-sum 1.

H0 MODEL.

//v VENTOI? (zarzcmmezlre WITNESSES:

m: uonms PETERS CDJPNOYDLITNQ.WASHINGTON, n. c

PATBNTED MAR. 24, 1902.. 0. J. REISE.

V DERRICK. APPLICATION FILED JULY 25, 1902.

3. SHEETS-SHEET 2.

N0 MODEL W/ TNE SSE S.

' No. 723,731. PATENTED MAR.'24, 1903. 0. J. ,REISE.

DERRICK.

APPLICATION FILED JULY 25, 1902. N0 MODEL. -3 SHEETS-SHEET 3.

WITNESSES. /NVEN7'0f? UN TED STATES PATE T lemon.

CHARLES J. REISE, OF MINERAL, ILLINOIS.

DERRICK.

SPECIFICATION forming part of Letters Patent No. 723,731, dated March24, 1903.

Application filed July 25, 1902. Serial No. 116,932. (No model.)

To all whom it may concern:

Be it known that I, CHARLES J. Rnrsn, a citizen of the United States,and a resident of Mineral, in the county of Bureau and State ofIllinois, have invented a new and Improved Derrick, of which thefollowingisafull, clear, and exact description.

My invention relates to improvements in derricks of that class whichemploy a swinging platform adapted to carry the operating and hoistingengine and to also carry the mast and boom which are adapted tolift andtrans fer a load to or from the swinging platform or at any point withina prescribed limit relative to said platform.

One object of the present invention is to provide simple and durablemeans arranged to impart traveling motion to the platform in a manner tomake it turn a complete revolution in one direction or the other.

A further object of the invention is to simplify the platform-operatingmechanism and increase the durability thereof by reducing the number ofguide-sheaves and by the substitution of a driving-chain for the cableusually employed,the reduced number of sheaves so employed beingarranged to enable the service of the driving-chain to be utilized inthis class of apparatus.

With these ends in view theinvention consistsin the combination,construction, and arrangement of parts, which will be hereinafter ,fullydescribed and claimed.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar characters of reference indicate.corresponding parts in all the figures.

Figure 1 is a side elevation of aderrick embodying the improvementscontemplated by this invention. Fig. 2 is a sectional plan view taken inthe plane indicated by the dotted line 2 2 of Fig. 1. Fig. 3 is a planview ofthe foundation-framework, illustrating the circular track onwhich the swinging platform is adapted to turn and the arrangement ofthe chain around said track; and Fig. 4 is an enlarged detail view,partlyin section and in elevation, of certain features of the invention.

5 designates the framework or stationary platform, which forms the baseadapted to support the operating devices of myimproved derrick. Thisframework may consist ofsuitable timbers having the platform securedthereto, and on this platform is fastened a circular track 6. This trackpreferably consists of a railway-rail bent into annular form .andadapted to be spiked or otherwise fastoned to the platform. The exteriorface of the rail is provided with a series of indentations 7, connectedby intermediate grooves 8, as shown more clearly by Figs. 3 and 4, andthese indentations and grooves form an active face on the circular trackdesigned to effectually prevent slipping of the driving-chain, presentlydescribed, around the external face of the track.

lOdesignates-the swinging platform, which is provided with suitablecarrying wheels or rollers 9, the latter being. journaled in suitablebearings provided on said platform and fashioned to ride freely on thetop edge of thetrack 6. This platform supports or carries an engine 11of any suitable construction, the same being preferably arranged nearone end of the platform, as shown by Fig. 1.

A vertical framework 12 is erected on the swinging platform, preferablyat the end opposite to the engine, and this framework constitutes a mastwhich is stayed by the tierods 13. A swinging boom 14 is pivotallyconnected to the swinging platform at a point adjacent to the mast l2,and said mast and the boom are connected by a suitable tackle 15, theoperating-line of which is coiled on one of the drums of the engine. Theboom is also provided with suitable guide-sheaves 16, adapted to guidethe cables or chains of the hoisting mechanism 17, the latter beingoperated by one of the drums of the engine, as shown. The detailedconstruction of the boom, the tackle mechanism therefor, and

the housing appliances may be modified with Y in wide limits.

18 19 designate suitable pillar-blocks which are secured to the swingingplatform 10 and support a horizontal shaft 20. This shaft is adapted tobe driven by the engine, and as one means for accomplishing this end Ihave shown one end of the shaft as having a bevelgear 21, with whichmeshes the bevel-gear 22 on the counter-shaft 23, the latter beingbelted to the engine, as shown by Figs. 1 and 2. The outer end of thisshaft 20 is disposed over an opening or recess 24, which is provided inone end of the swinging frame, as shown by Fig. 4, and to the under sideof this swinging frame at points adjacent to the vertical recess 24: areapplied the bearings 25. In these hearings are mounted the guidesheaves26 27, which extend part Way across the recess 2 1i and are free to turnon axes which are inclined to the longitudinal axis of the swingingframe. These guide-sheaves 26 27 are peripherally grooved for theaccommodation of the operating-chain, and said grooved sheaves aredisposed adjacent to the outer active face of the circular track, thelower edges of said sheaves overlapping said active face of the track.

A power-wheel 28 is fastened to the outer end of the shaft 20, so as tolie directly over the vertical recess 24, the axes of said shaft 20 andthe power-wheel 28 being in a vertical plane between the opposingguide-sheaves 26 27. The diameter of this power-wheel 28 exceeds thewidth of the space between the contiguous grooved edges of theguidesheaves 26 27, as shown more clearly by Fig. 4. This powerwvheel 28is provided with a peripheral groove 2.) and with indentations adaptedfor the accommodation of the chain-links.

3O designates an endless driving chain which passes over and engageswith the power wheel 28 and is thence carried beneath the groovedsheaves 26 27 and around the circular track, seats to engage with theactive face thereof. (See Figs. 3 and 4.) The chain engages with theactive face of the stationary track and with the grooved face of thepower-wheel 28 in a manner to minimize slippage of the chain withrelation to these devices, thus increasing the efficiency of theapparatus as a Whole.

My improved construction enables me to dispense with a number ofguide-sheaves, because I find it necessary to only employ two of thesheaves, which occupy the active relation to the track shown by Fig. 4and are disposed directly below the power-wheel on the driving-shaft 20.This materially simplifies the construction and also cheapens theapparatus.

I find that a chain possesses marked durability as compared with acable, and it is estimated that the endless chain herein described as anessential part of this invention will last at least one year longer thana wire cable, therebyincreasing the durability of the structure.

It is evident that the platform 10 may be pivoted centrally on thestationary base by a suitable post 33, thus preventing edgewisedisplacement of the revoluble parts of the apparatus.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- A derrick comprising a base-platform, a circulartrack fastened thereto and provided with an external grooved activeface,a swinging platform mounted to travel on said track, a radialhorizontal driving-shaft mounted on said swinging platform, a singlepair of adjacent guide-sheaves journaled on the swinging platform onopposite sides of said driving-shaft and arranged to overlap thecircular track, a power-Wheel fastwith the shaft and of a diametergreater than the space between the guide-sheaves, and an endless chainembracing the active face of the track and having an upwardly-extendingbight which passes over the power-wheel and under the guide-sheaves.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

CHARLES J. REISE.

Witnesses:

E1). OALLAHAN, E. J. COLLINS.

